Thethuthinnang was a doe who was a part of Efrafa but was rescued by the Watership Down rabbits. She ended up being the mate of Bigwig. Thethuthinnang is one doe out of the other ten or eleven does from Efrafa. When they returned to Watership Down, she became Bigwig's mate. In the television series she was replaced and renamed as Spartina, but still became Bigwig's mate.